Accounts Receivable and Major Customers

3 Months Ended

Mar. 31, 2012

Accounts Receivable and Major Customers

4.    Accounts Receivable and Major Customers

The following table summarizes our accounts receivable by type as of the dates presented:

	March 31,			December 31,
	2012			2011
Customers	$	48,695		$	49,763
Joint interest partners		22,844			22,755
Other		1,109			1,695
		72,648			74,213
Less: Allowance for doubtful accounts		(1,265	)		(1,781	)
	$	71,383		$	72,432

For the three months ended March 31, 2012 and 2011, five customers accounted for $55.7 million and $31.8 million, or approximately 67% and 47%, of our total consolidated product revenues. As of March 31, 2012 and December 31, 2011, $29.4 million and $36.0 million, or approximately 41% and 50%, of our consolidated accounts receivable, including joint interest billings, related to these customers. No significant uncertainties exist related to the collectability of amounts owed to us by these customers.